[postgis-devel] Do you think we should put a note about 2D and 3D on each function?

Obe, Regina robe.dnd at cityofboston.gov
Thu Sep 18 06:00:40 PDT 2008


I was thinking we should probably put a note on each function about what
is only supported for 2D and what works for 3D.
It would be nice to have a standard tag for this so we can tease it out
in an XSLT call into an index later on.

E.g. ST_Collect works for both 2D and 3D.  ST_Union does some Z-index
averaging but not true 3d.
ST_Makeline works for 2D and 3D etc.

ST_AsText always returns a 2d rep where as ST_AsEWKT returns a 2d/3d
rep.

What are your thoughts on that?  Seems like more people seem to be
trying to use the 3D support these days.

Thanks,
Regina



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